Driving-belt.



T.'osAKL DRIVING BELT. I

0N FILE AFPI-ICAI'. .11| I9|5| 1,249,661 Patented Imc., Il, 1917.

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TAKAZO OSAKI, F ITACHIBORI, OSAKA, JAPAN.

DRIVINGvBELT.

Appneann inea December 11, 1915. serial No. casse.

.To all whom it may concern:

Be it known that I, Tannzo Osam, a subject of the Empire of Japan, residing at 9, ll/finami-dori G-chome, Itachibori, Nishi-Ku, lsala, Japan, have invented a certain new and useful invention Entitled DrivingBelt, of which the following is a specification.

My invention relates to a driving belt, in production whereof a number of strands, each consisting of yarns from such fibrous material as cotton or hemp, closely put together, are placed in a row, and these are entwisted with one another in a manner as specified below.

Yl`he object of the invention is to produce a belt made of fibers, which is strong, pliable and durable, at a cheap cost, and to provide it for the transmission of power.

"l`he accompanying drawing is a plan of the belt made of sixteen strands as example, and shows how these strands are entwisted to produce it according to my invention.

ln the drawing, 1 to 1G show a number of strands, and 1 makes a pair with 2, 3 with Zl, with tl, 7 with 8, 9 with 10, 11 with 12, ld with let, with 16.

lfhe strands of each pair mentioned above are entwisted several times, to the line fl-A, where the strands 1, 3, 5, 7, 9, 11, 13 are respectively entwisted with the adjoining strands only one time, z'. c., 1 with 1l, 3 with tl, 5 with 8, 7 with 10, 9 with 12, 11 with 14E, 13 with 16, and then reverting to the original state, each original pair of strands is entwisted with itself several times, and at the line of B--B, the strand 2 is entwisted with 3, d with 5, 6 with 7, 8 with 9, 10 with 11, 12 with 13, 1li with 15 only one time, and then each original pair is again entwisted with itself as many times as in interval between the line A-A and B-B, and at the line C-C a strand of each pair is entwisted with one of the adjoining pair in the same manner as in the line A--A, and thus repeating` the intertwistimgof all these strands as specified from the line A-A to ll-C, finally producing a fiat band just like a network. This constitutes a belt of rnv invention.

l`he belt is to be made endless when the extremities of each strand are tied together, so that the one end of the belt closely meets the other.

"ll`he special use of the belt lies in the fact that the tension each strand receives. when power is transmitted, is uniform, and also Specification of Letters Patent.V

Patented Dee. 11, 191i.

thaty'arns, which"` constitute each strand, being equal in the stress, bear each the same load. Now, in comparison of my belt with that hitherto in use, which consists of a thick fabric, or of several plies of fabric cemented together by such material as gutta percha, it is first-ly found that in suoli a belt made of either a thick fabric or cemented fabrics, the warps only sustain the tension, while the wefts being in right angle thereto have no tension to bear. But in my belt, as all the yarns are arranged in the same direction, and also are entwisted in the same manner, each bears the tension evenly, and accordingly the efficiency of the belt for the transmission of power is considerably great. And secondly, in a belt consisting of several plies of fabric cemented together, its inner surface in contact with the pulley is less strained than its outer surface. But in my belt, as one strand reciprocally comes under the other by twisting, there happens in this case no distinction of in and out, and accordingly the belt does not bring upon itself any unequal strain; on this account it is strong and durable. Thirdly, as my belt requires no insertion of the weft and cementing material, its weight is considerably reduced, and accordingly its cost minimized, moreover a loss of energv clue to the motion of the belt itself or of energy owing to the centrifugal force shall be greatly reduced. Fourthly, as my belt is pliable, it fits the pulley closely. Fifthly, in my belt, the pores left between each pair of the strands act as the escape of the air film whirled into between the pulley and the belt when the motion is at highest speed, and secure close touch of the belt to the pulley. Sixthly, the strength of ordinary belt at its joint even in its best state is not more than 80% of the strength inherent to the belt. But in my belt, as each strand is tied together on its extremities, the strength of its joint is never reduced at all.

I claiml1. A drivincr belt comprising a plurality of pairs oflongitudinallv extendingstrands having one strand of each pair entwined about one strand of the next adjacent pair at a plurality of longitudinally spaced points, and having the other strand of each pair entwined about the other strand of the next adjacent pair at a plurality of longitudinally spaced points alternating with the lirst mentioned points, the strands of each pair being entwined about each other a nlura-lity of times between Said longitudinally spaced points.

2. A driving' belt as claimed in claim l, wherein the strands of the adjacent pairs at said longitudinally spaced points are en twined about each other an odd number oftimes and the strands of each pair are en*- twined about each other between said points an even number of times.

1n testimonyv whereof I have ailixed my signature in presence of two witnesses.

TAKAZO @SARL VVitnesseS DEN Kino, EISHIRO Ann.

@oplet of this patent may be obtained for ve cents each, by addressing the Commissioner of Buteurs,

Washington, D. C. 

